1. A potent beverage that used to be called Mad Dog 20/20, but the company decided it was better for business to change it to MD 20/20 (yes that is much better -?-)
2. To stare someone down:
A) in response to an initial provocation or
B) to start a fight, or to start shit with another

1. 'Man that Mad Dog had me on tilt last night, sorry if I tried to get with your sister'
2. 'I mad dogged that nuckka until he pussied out', 'I mad dogged that police and that's how I got 50 stitches in my head'

Slang term for Mogen David wine, especially the fortified-wine MD 20/20 variety. The MD stands for Mogen David. It was shortened to MD for their line of bum wines to differentiate between their more respectable (if no less nasty) line of kosher wines.

Contrary to popular myth, there has never been a wine sold under the name Mad Dog.

Got me some Mad Dog last night and got fucked up.

There's a new flavor of Mad Dog called Buck Bunny and it's licorice! Nasty!